High Peak – to – average power ratio (PAPR) of transmitted signals is a major shortcoming for multicarrier modulation system such as orthogonal frequency division multiplexing (OFDM) and wavelet packet modulation (WPM). This paper introduces a novel OFDM system base on dual – tree complex wavelet transform (DT-CWT). In the proposed scheme, DTCWT is used in the place of fast Fourier transform (F...

In an investigation of the auditory cortex response to speech, six subjects were studied using echo-planar functional magnetic resonance imaging (fMRI) at 2.1T. The subjects were asked to listen to English nouns presented at various rates ranging from 0 words per minute (wpm) to 130 wpm while fMRI images encompassing their primary and posterior superior secondary auditory cortices were acquired...

The handheld organizer or personal digital assistant (PDA) is rapidly becoming a popular organizational tool, and there is a need for evaluation of alphanumeric character entry on these devices. The Palm operating system, the most common PDA operating system on the market, uses two methods for character entry, an on-screen virtual keyboard and a single-character handwriting recognition system c...

This study aimed to investigate the microstructural, tribological and rheological properties of water-in-water (W/W) emulsion droplets with or without stabilization by proteinaceous microgel particles. The W/W emulsions were prepared from mixtures gelatinized corn starch (GS) κ -carrageenan ( C) in two-phase regime when particle-stabilized whey protein particles (WPM) used. shear thinning liqui...

The perceptual span or region of effective vision during eye fixations in reading was examined as a function of reading speed (fast readers were compared with slow readers), font characteristics (fixed width vs. proportional width), and intraword spacing (normal or reduced). The main findings were that fast readers (reading at about 330 wpm) had a larger perceptual span than did slow readers (r...

This paper presents a usability study for text entry with a new version of the assistive keyboard replacement OnScreenDualScribe. Over five sessions (approximately 1 hr/session), three able-bodied novice participants achieved an entry rate of 13.9 wpm. In a case study, one disabled expert achieved an entry rate of 6.6 wpm. The main aspects of the software are described and differences to the an...

This paper introduces a novel OFDM system base on dual – tree complex wavelet transform (DT-CWT). In the proposed scheme, DT-CWT is used in the place of FFT. The proposed scheme offers the best PAPR performance than the conventional OFDM and WPM systems at the expense of acceptable computational complexity without using any pruning techniques. The CCDF for the proposed scheme signal achieves ab...

AIM To validate the accuracy and repeatability of a mobile app reading speed test compared with the traditional paper version. METHOD Twenty-one subjects wearing their full refractive correction glasses read 14 sentences of decreasing print size between 1.0 and -0.1 logMAR, each consisting of 14 words (Radner reading speed test) at 40 cm with a paper-based chart and twice on iPad charts. Time...